Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from NO891877Aexternal-prioritypatent/NO177726C/en
Publication of NO920890LpublicationCriticalpatent/NO920890L/en
Application filed by British Gas PlcfiledCriticalBritish Gas Plc
Priority to NO19920890ApriorityCriticalpatent/NO304665B1/en
Publication of NO920890D0publicationCriticalpatent/NO920890D0/en
Publication of NO304665B1publicationCriticalpatent/NO304665B1/en